51943237 has 2 divisors, whose sum is σ = 51943238. Its totient is φ = 51943236.

The previous prime is 51943231. The next prime is 51943247. The reversal of 51943237 is 73234915.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33744481 + 18198756 = 5809^2 + 4266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51943237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51943231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25971618 + 25971619.

It is an arithmetic number, because the mean of its divisors is an integer number (25971619).

Almost surely, 2^51943237 is an apocalyptic number.

It is an amenable number.

51943237 is a deficient number, since it is larger than the sum of its proper divisors (1).

51943237 is an equidigital number, since it uses as much as digits as its factorization.

51943237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 34.

The square root of 51943237 is about 7207.1656703589. The cubic root of 51943237 is about 373.1152530733.

The spelling of 51943237 in words is "fifty-one million, nine hundred forty-three thousand, two hundred thirty-seven".